I purchased a dedicate server (Ubuntu 14.04 LTS amd64) with a failover ip from online.net. And i want to setup a windows vm with failover ip using kvm. I tried myself several times, but all failed. Any one could tell me how to do this? Because of my poor english and low linux knowledge, please describe steps as much detail as possible.
iface lo inet loopback
iface em1 inet dhcp
iface em1 inet6 static
pre-up dhclient -cf /etc/dhcp/dhclient6.conf -pf /run/dhclient6.em1.pid -6 -P > em1
pre-down dhclient -x -pf /run/dhclient6.em1.pid
iface em1:0 inet static